What are filter substrates?
Filter substrates are used to purify rainwater by reliably retaining solids, adhering pollutants and dissolved contaminants. They are used in decentralised rainwater treatment systems such as filter substrate channels, filter shafts, infiltration swales or swale trenches, where they play a central role in the drainage, infiltration or further treatment of precipitation runoff.
With defined grading curves, high reactivity and frost-resistant material properties, HAURATON filter substrates ensure consistently stable purification performance. They support both the separation of filterable substances (AFS < 200 μm) and fine particles (AFS63 < 63 μm) as well as the binding of dissolved pollutants, especially heavy metals.
Why HAURATON filter substrates?
Our technical filter substrates have been specially developed for use in decentralised systems such as channels, infiltration shafts or infiltration swales, as well as for centralised retention soil filter systems. They meet all relevant requirements of DWA regulations and thus offer maximum planning and operational reliability.
Thanks to their good hydraulic permeability, long-term filter stability and high resistance to frost and de-icing salt, HAURATON substrates ensure permanently safe and efficient rainwater treatment – even under demanding conditions in the transport and infrastructure sector.
Filter substrates at a glance
The following filter substrates offer the right solution for different applications and are an integral part of our rainwater treatment systems. Here you will find an overview of their properties and areas of application.
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